Sectional boiler.



M. A. COOK, DEGD.

M. A. 000K, EXEOUTRIX.

SECTIONAL BOILER. APPLICATION FILED FEB. 20, 1906. RENEWED JAN. 17. 1912- Patentd 0st. 7

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MARCY A. COOK, OF PEOBIA, ILLINOIS; MARY A. COOK EXECUTE/IX OF SAID MARCY A. COOK, DECEASED.

SEG'IIONAL BOILER.

Specification of Letters Patent.

Application filed February 20, 1906, Serial No. 301,983. Renewed January 17, 1912. Serial No. 671,564.

To all whom it may concern:

Be it known that I, Manor A. Coon, a citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Sectional Boilers; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention has reference to sectional boilers for heat and power purposes, and the object of my improvements is to provide a sectional boiler that is of simple construction and of greater strength than those heretofore used,that presents a large surface to the fire. and heated gases and utilizes the heat to the best advantage,-that may be made with a magazine for containing a supply of fuel and feeding the same to the fire as needed,-and that provides for the proper introduction of sufiicient air to the fire box to efiect perfect combustion. And my in vention also embraces other features of im provement, the nature and character of which will more fully appear hereinafter.

Referring to the accompanying drawings, which are made a part hereof and in which similar reference characters indicate similar parts in the several views, Figure 1 is a vertical longitudinal sectional view of a sectional boiler containing my improvements; Fig. 2 a view of the boiler of Fig. 1 looking at the front thereof, the boiler front at the left of the line abeing removed to show the first section and the interior of the boiler; Fig. 3 a view illustrative of the boiler of Figs. 1 and 2 showing atthe right of the line b a vertical sectional view of a boiler section and at the left of the line -Z the inner face of the boiler back; and Fig. 4 a vertical cross sectional view of a modified form of sectional boiler constructed in accordance with my invention.

The sections 1, which compose the boiler, are hollow or chambered throughout and are arranged vertically in horizontal series and in close contact. These sections are cast with an upper circular portion 2 which is supported at each side by the depending water legs 3, and the said upper circular portion is divided by hollow partitions into flue openings to provide passageways for the circulation of the heated gases from the fire.

In Figs. 1, 2 and 3, which illustrate what I shall hereinafter refer to as the magazine boiler, I have shown the upper circular portion 2 of the sections with the two segmental flue openings 4, one at each side thereof, and a pair of flue openings 5 between the upper portions of the segmental openings 4. Between the lower portions of the said segmental flue openings 4 and beneath the pair of flue openings 5 is a magazine opening 6, the lateral walls 7 of which diverge clownwardly and terminate in water pockets 8. To facilitate the circulation of water in the pockets, the extreme lower portions thereof are connected to the adjacent water legs 8 by the integral tubular passageways 9 which said tubular passageways are inclined slightly from the water pockets to the water legs, as shown. Intermediate of the water pockets and water legs of each section and above the tubular passageways 9 are open ings 10 which furnish a passageway for the escape of smoke and gases from the fire box of the boiler.

The sections 1 are'preferably cast in the form herein shown with no sharp corners, the intersect-ions of all surfaces being rounded and the tubular portions being made oval in cross section (the direction of extension of the oval form being across the thickness of the sections or lengthwise of the boiler) thus increasing the heat surface and adapting the sections to withstand'a high pressure. The sections are further strengthened by stays or braces 11 cast in the sections and staggered as shown. These sections when properly assembled form the side and top walls of the boiler, and the front and rear are closed by the plates 12 and 13 respectively, which are spaced or distanced from the end sections by means of the flanges 14 which conform to the outline of the sections and bear thereagainst.

I have shown a boiler herein built of five sections, but the number of sections may be increased or decreased according to the amount of heat or the number of horse power desired, and the size of the fire box may also be increased or decreased as required. The grate surface of the fire box is formed of a series of grates 15, one mounted on each section of the fire box by means of the lugs or trunnions 16 on the ends thereof, which fit within the U shaped ears or projections 17 on the inner face of each through the series of boiler sections if desired or may be partitioned off, thus limiting the size of the fire box and forming a chamber at the rear of the partition for the expansion and circulation of the heated gases from the fire. For stopping off the grate surface and limiting the size of the fire box, there is provided above the grate surface, a hollow water back 19 which extends from side to side of the chamber formed between the water legs of the boiler sections and fits between adjacent water legs, the said water back terminating at the grate surface and being supported by an integral plate extension 20 which extends to the base of the ash pit. This water back, as is shown in the drawing, extends from the grate surface'to within a short distance of the lower extremities of the water pockets 8, and provision is made for the circulation of water through the said water back 19 by the pipe 21 which is connected to the said water back near the bottom and to an adjacent water leg at a point on a-line with orbelow its connection with the water back, and the pipe 22, which is connected to the said water back near the top and to an adjacent water leg at a point on a line with or above its connection with the water back. Above the water back and resting thereon is a plate 23 which conforms to the shape of the maga- Zine opening and is positioned between two adjacent sections shutting off communication of the magazine opening with the chamher at the rear thereof but allowing communication at each side through the openings 10. This plate 23 is provided near the top with an opening 2t closed by the dam per 25 which can be opened from the outside of the boiler by means of the rod 26 which extends through between the sections and upon which the damper is mounted, the said damper being provided for use when the boiler is to be used as a surface burner.

The boiler front 12 is provided with the customary ash door 27 communicating with the ash pit below the grate, and fire door 28 opening into the fire box above the grate, and is further provided with a magazine door 29 which opens intothe upper portion of the magazine 6. The boiler front 12 may also be provided with the flue doors 30 and 31 to allow access to the fines, although these doors are not required as the-construction and operation of the boiler is such that the fines do not become filled and need cleaning. Upon the boiler front and at one side is mounted a lever 32 which is connected to the common rod 33 hereinbefore mentioned, whereby the grates 15 may be rocked for shaking down the ashes from the fire.

Adjacent the grate of the first section and extending from the plane of the grate surface to a plane level with the lower edge of the fire door and from side to side of the boiler front is a hollow water front 3% (shown in full lines in Fig. 1 and by dotted lines in Fig. 2) which is connected to and mounted on the said boiler front 12 by means of the plate 35 which effectually prevents communication of air from the ash pit to the fire box. This water front may be used for heating water for domestic purposes or for heating the water previous to its introduction into the boiler, as shown herein, and serves the further purpose of heating air which is introduced into the fire box, as hereinafter mentioned. WVhen the water front is used to heat the water previous to its introduction into the boiler, it is connected at the bottom as at 36 to the water supply, and there are provided pipe connections 37 communicating with the top of said water front and with the headers 38 which are located at each side of the boiler, near the bottom thereof, the water leg of each section being connected. near the lower extremities to the said headers, as shown, thus providing a constant uniform supply of water to all the sections composing the boiler. Mounted on top of the boiler and connected as at 39 tothe highest point of each boiler section, is a header or-doine 10, which re-' ceives its supply of hot water or steam, as the case may be, from all the sections, and from which the hot water or steam is conveyed where desired.

To effect perfectcombustion, it is neces sary that a considerable amount of air be introduced into the fire box above the grate surface and allowed to mix with the'gases resultant from the burning of the fuel. It

is further necessary that this air be heated previous to its introduction into the fire box. For providing a supply of air'and introducing the same above the'grate surface, there are provideda series of perforations 41 in the boiler front belowthe fire door and in front of the water front 34, through which air is drawn, heated somewhat bypassing over the said Water front, and introduced into the fire box. "For admitting air into the fire box, at the rear thereof, there is provided a plate 12 suitably distant from and mounted on said'water back and open at the top and bottom to provide an airspace whereby airmay pass from the'ash pit between said plate and the water back to the fire box. Air is further supplied to the gases, as they escape from the fire through the pair of air boxes 43, which extend from the boiler front to the boiler back, and communicate with the air inlets 44 in the front and air inlets 45 in the back of the boiler, said air inlets being controlled to regulate the supply of air to said air boxes. These air boxes rest upon the tubular passageways 9 and the under walls are provided, within the fire box, with perforations 46 through which the air is communicated to the fire box and exhaust passageways.

The flue openings 4 from the magazine and partition 47 (indicated by dotted lines in Fig. 2) which connects the side flange of the boiler front, and compels the smoke and gases to escape out through the openings 10 to the rear of the boiler, where a rib or partition 48 which incloses the flue openings 5 compels the smoke and gases to pass through the fines 4 to the front of the boiler from whence they escape through the flues 5 to the rear of the boiler from whence they escape through the nozzle or opening 49, which leads from the inclosed chamber formed by the partition 48 to the smoke stack or exhaust duct.

The assembled boiler parts are securely lock-ed together by the rods 50 which pass through corresponding lugs 51 on the boiler front and back, and T preferably cover the outer surface of the boiler sections with an asbestos covering 52 so as to retain the heat.

Assuming the boiler to be assembled as shown in Figs. 1, 2 and 3 of the drawing, with the pipe 36 connected to a suitable water supply, water passes through the water front- 34 into the headers 38 on each side of the boiler and enters and fills each boiler section, and also the water back 19. When used as a magazine feed, a supply of fuel is piled in the magazine 6 through the magazine door 29, and, the damper 25 being closed there isno draft therethrough, and the fuel in the magazine is prevented from burning. However, it is subject to the heat from the fire below, which gradually burns out the carbon as it nears the fire surface and expands, necessitating that the walls diverge toward th-elower extremities as shown, to prevent binding or hanging of the fuel therein as the magazine is emptied. The smoke and gases from the burning fuel together with the air mixed therewith, pass from the fire box, between the tubular passageways 9 into the openings 10 to the rear of the boiler, and behind the partition which stops oif the magazine openings, the fire box and the ash pit, from whence, they pass through the flue openings 4 to the front of the boiler, and are then carried through the flue openings 5 to the rear of the boiler and out through the smoke stack and 5 are separated fire box by a rib or i or exhaust duct. Thus, it will be seen the smoke and gases act upon the boiler three times before being discharged.

When this boiler is used as a surface burner, the damper 25 is opened and fuel is supplied through the fire door 28 and only in sufiicient quantity to maintain the fire. The operation, however, is the same when used with the magazine except that the opening of the damper in the magazine partition allows the smoke and gases torise in the magazine and pass out through the said opening 24 as well as through the side openings 10.

In 'Fig. 4, there is shown a modified form of the boiler, shown in Figs. 1, 2 and 3, the modification consisting merely in the elimination of the magazine, making the boiler at all times a surface burner. In this case the upper face of the water back 53 is made circular as shown, to conform to the outline of the under surface of the boiler and the tubular members 54 communicate near the center of the lower portion of the boiler and the rib or flange partitions 47 and 48 on the boiler front and boiler back are arranged to direct the exhaust of the smoke and gases to the rear of the boiler, thence to the front of the boiler through the flue openings 4 and 55 and thence to the rear of the boiler and out through the fines 5, all of which is thought to be readily understood and require no further mention.

"What I claim is:

1. A sectional boiler comprising upright sections arranged side by side, each section consisting of av substantially circular hollow wall, water legs tangentially connected with the substantially circular hollow wall, for supporting same, upright tubular part-itions connecting upper andlower portions of the substantially circular hollow wall forming segmental flue openings, and hollow partitions intermediate of the said upright tubular partitions for forming other flue openings.

2. A sectional boiler comprising upright sections arranged side by side, said sections being provided with matching fire box openings near the base thereof, matching magazine openings above and communicating with the fire box openings, matching segmental fiue openings at each side of the magazine openings, and matching flue openings above the magazine openings.

3. A sectional boiler comprising upright sections arranged side by side, said sections being provided with matching ash pit and fire box openings, matching magazine openings above and communicating with the fire box openings, and matching flue openings at the sides of and above the magazine opening's, a closure at each end of the series of sections provided with walls arranged to direct the products of combustion from the fire box to and through the flue openings, the closure at one end of the boiler being )1O\ll' ll with a fire box open ng on line with and communicating with the fire box, and a magazine open ng above the fire box opening, on line witi and communicating with the magazine.

i. A sectional boi er, comprising.upright sections arranged side by side, said sections being provided with matching ash pit and fire box openings, matching magazine openings above and ccmi'nunicating with the fire box openings, said magazine openings being of less width than the fire box openings and having the lateral walls thereof diverging downwardly to the fire box, matching segmental flue openings at each side of the magazine opening, and matching flue openings above the magazine openings, a closure for the rear end of the sectional boiler provided with an. inclosure on the inner face thereof communicating with the flue openings above the magazine 0 ienings and hav ing a smoke outlet therefrom, and a closure I for the front end of the sectional boiler provided with an inclosure 0n the inner face thereof communicating with all the flue openings, said front closure being provided with a fire box opening on line with and communicating with in the'sectional boiler, and a magazine opening above the tire box opening on line with and communicating with the magazine openin the sectional boiler. p

In a sectional boiler, the combination of a plurality of upright sections arranged side by side, said sections being provided with matching the box and ash pit open ings, matching magazine openings above and communicating with the fire box openings, and matching flue openings at the sides of and above the magazine openings, end closures for the series of boiler sections adapted to direct; the products of combustion from the fire box to and through the flue openings, and a wall intermediate of the end closures, for stopping 01f the ash pit and fire box opening in the series of boiler sections, said intermediate wall being provided with a portion projecting into the magazine opening for stopping off the magazine opening.

In testimony whereof I have atfixed my signature, in presence of two witnesses.

MARCY A. COOK.

l/Vitnesses:

CHARLES V. MILEs, E. M. GILES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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